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<p>The interlayer Dzyaloshinskii–Moriya interaction (IL-DMI) across the non-magnetic spacer layer in a ferromagnetic/nonmagnetic/ferromagnetic metal multilayer plays a crucial role in facilitating the design of chiral spin textures and field-free magnetization switching. Until now, the induction of such IL-DMI has required either a magnetic field along the sample plane during the growth process or a wedge shape of the sample, limiting practical applicability. Here, a controllable IL-DMI induced by post-processing was generated in an <i>L</i>1<sub>0</sub>-FePt/Pt/Fe multilayer without any special deposition conditions. However, the IL-DMI for the as-prepared sample is negligible, although an obvious difference in the magnetic anisotropy of the two ferromagnetic layers was observed by polarized neutron reflectometry measurements. When the device is applied by a large pulsed current in a tilted magnetic field, a significant IL-DMI can be generated. Meanwhile, the direction of the IL-DMI can be reversed in the <i>L</i>1<sub>0</sub>-FePt/Pt/Fe multilayer, depending on the direction of the tilted magnetic field. Furthermore, an apparent field-free magnetization switching in the <i>L</i>1<sub>0</sub>-FePt/Pt/Fe multilayer is achieved by the controllable IL-DMI. The experimental results reveal an interfacial effect on the IL-DMI, which paves the way for the applications of spin-logic devices based on the interlayer DMI.</p>

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Controllable generation of interlayer Dzyaloshinskii-Moriya interactions in the L10-FePt/Pt/Fe multilayers for field-free magnetization switching

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月30日

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  • Xiao Deng,
  • Yanzhe Zhao,
  • Tao Zhu,
  • Jingyan Zhang,
  • He Huang,
  • Pengwei Dou,
  • Yuanbo Wang,
  • Jialiang Li,
  • He Bai,
  • Xiaozhi Zhan,
  • Sheng Cheng,
  • Yaqin Guo,
  • Jie Qi,
  • Yunchi Zhao,
  • Shouguo Wang

摘要

The interlayer Dzyaloshinskii–Moriya interaction (IL-DMI) across the non-magnetic spacer layer in a ferromagnetic/nonmagnetic/ferromagnetic metal multilayer plays a crucial role in facilitating the design of chiral spin textures and field-free magnetization switching. Until now, the induction of such IL-DMI has required either a magnetic field along the sample plane during the growth process or a wedge shape of the sample, limiting practical applicability. Here, a controllable IL-DMI induced by post-processing was generated in an L10-FePt/Pt/Fe multilayer without any special deposition conditions. However, the IL-DMI for the as-prepared sample is negligible, although an obvious difference in the magnetic anisotropy of the two ferromagnetic layers was observed by polarized neutron reflectometry measurements. When the device is applied by a large pulsed current in a tilted magnetic field, a significant IL-DMI can be generated. Meanwhile, the direction of the IL-DMI can be reversed in the L10-FePt/Pt/Fe multilayer, depending on the direction of the tilted magnetic field. Furthermore, an apparent field-free magnetization switching in the L10-FePt/Pt/Fe multilayer is achieved by the controllable IL-DMI. The experimental results reveal an interfacial effect on the IL-DMI, which paves the way for the applications of spin-logic devices based on the interlayer DMI.